Caverna Aroe Jari, Sandstone cave in Chapada dos Guimarães National Park, Brazil.

Caverna Aroe Jari is a sandstone cave within Chapada dos Guimarães National Park featuring multiple chambers and interconnected passages. A stream flows through the cave system and creates a natural lagoon near the entrance area.

The first scientific reports on the cave are attributed to the spelunker Ramis Bucair, who visited it in the early 1970s. In 1989 the cave was included in the Plano de Reordenamento da Ocupação da Chapada, drawn up by FEMA, the state environmental foundation. By decree 99556/90 the surrounding region was declared an environmental preservation area.

Aroe Jari means "soul shelter" in the Bororo language, and the cave is also known as Frenchman Cave. It lies on Fazenda Água Fria, 46 km from Chapada dos Guimarães. Near the entrance, a stream forms the Blue Lagoon, a natural pool whose blue water reflects on the cave walls.

Visitors explore the cave only with certified guides who safely lead the way through sandstone formations. Sturdy footwear, a headlamp, and a helmet are necessary to navigate the pathways securely.

The cave is also called Frenchman Cave, and its Bororo name Aroe Jari means Soul Shelter. At 1,550 metres it is the largest sandstone cavern in Brazil, lying 46 km from Chapada dos Guimarães on Fazenda Água Fria. Near the entrance a stream feeds the Blue Lagoon, a natural pool whose blue water reflects on the cave walls.